Finding the Fourth Proportional to 121,764.94, 167,976.99 and 76,420.53
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Solution
The fourth proportional to 121,764.94, 167,976.99 and 76,420.53 is: 105,423.54
Step by Step Solution
- Step 1: Write the proportion equation
121,764.94 : 167,976.99 = 76,420.53 : x - Step 2: Convert to fraction form
121,764.94/167,976.99 = 76,420.53/x - Step 3: Cross multiply
121,764.94x = 167,976.99 × 76,420.53 - Step 4: Simplify right side
121,764.94x = 12,836,890,603.60 - Step 5: Solve for x
x = 12,836,890,603.60/121,764.94 - Step 6: Final answer
x = 105,423.54
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.